Apparatus for delineating the moon s orbit



(No Model.)

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v APPARATUS FOR DELINEATING THE MOONS ORBIT. No. 487,800. Patented Dec.13, 1892.

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U ITE STATES PATENT OFFICE.

JOSEPH TROLL, OF BELLEVILLE, ILLINOIS.

APPARATUS FOR DELINEATING THE MOONS ORBIT.

SPECIFICATION forming part of Letters Patent No. 487,800, dated December13, 1892.

Application filed April 18, 1892.

To aZZ whom, it may concern:

Be it known that I, JOSEPH TROLL, a citizen of the United States,residing at Belleville, in the county of St. Clair and State ofIllinois, have invented a certain new and useful Apparat us forDelineating the Moons Orbit; and I do hereby declare the following to bea full, clear, and exact description of the same,

. reference being had to the accompanying drawings, forming part of thisspecification;

The presentinvention relates to an apparatus for graphically delineatingthe-path or orbit of the moon upon a blackboard or other like surface.

The object of the present invention is to provide a simple and effectivemechanism whereby a true wave-line to indicate the path of the moon isdrawn upon a circular line that indicates the path of the earth aroundthe sun, the purpose being to clearly demonstrate the fact that thelunar path is a regular wave-line. I attain such object by aconstruction and arrangement-of parts illustrated in the accompanyingdrawings, in which Figure l is a sectional elevation of one form or typeof my lunar-orbit delineator, and Fig. 2 a plan view of the same.

Similar numerals of reference indicate like parts in the both views.

Referring to the drawings, 1 represents'a cogged rim or disk fixedlyattached to the central stationary base or standard 2, at the center oraxis of which is arranged a vertical arbor 3, having a suitable knob orhandle, by which motion around its axis can beimparted to such arbor 3by hand.

4 represents a tubular arm of convenient length and thickness, one endof which is attached to the vertical arbor 3 in any suitable manner,preferably passing through a transverse orifice in said arbor, as shown.

5 is a slender shaft or spindle turning in suitable hearings on the armtand preferably arranged in the interior of the same, as shown, withpinions 6 and 7 on its respective ends, the pinion 6 gearing with thestationary cogged rim 1, so as to receive motion. therefrom when acircular motion is imparted by hand to the arm 4, while the pinion 7gears with a pinion 8 on the vertical shaft or sleeve 9, that hassuitable bearings in a bracket Serial No. 429,691- (No model.)

formation 10 on the outer end of the main tubular arm 4. The verticalshaft or sleeve 9 carries a fixed lateral arm 11, at the outer end ofwhich is a vertical shaft or sleeve 12, parallel to the shaft or sleeve9, the arrangement being such that as the sleeve 9 turns on its axis thesleeve 12 will move in a circular path around the same. The preferableproportions of the cog-rim 1 and pinions 6, 7, and 8 will be such thatthe sleeve 12 will revolve about twelve and one-third times around thesleeve 9 while such sleeve 9 and the main tubular arm 4 is making onerevolution around the axis or arbor 3.

With an apparatus constructed and operated as above the pencil ordrawing-point indicating the earths orbitwill draw a circular linearound the main axis that represents the sun, while the pencil ordrawing-point indicating the moons orbit will draw a regular wave-line,intersecting the circular line that represents the earths path, asillustrated in Figs. 2 and 3. The shafts 9 and 12 are parallel to eachother and have their lower ends in the form of receiving-sleeves forsections of pencils or other suitable drawing material, which aresecured in position by any usual and well-known holding or clampingmechanism.

In the practical construction of the apparatus it is preferable toarrange upon the upper end of the shaft 9 a globular enlargement 13 torepresent the earth, and adjacent thereto, but at a greaterproportionate distance than that between the sleeve 9 and 12, a smallerglobe 14: to represent the moon, while at the main axis or arbor 3 alamp 15 is arranged to indicate the sun.

The scope of my present invention is not limited to any specialmechanism, whereby the sleeves 9 and 12, carrying suitable markingmeans, are operated to graphically delineate the moons orbit or path, assuch movement of the sleeves may be attained by a variety ofintermediate mechanisms that are the mechanical equivalents to themechanism just described.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In an apparatus for delineating the moons orbit, the combination ofthe main radial arm 4, pivoted at its inner end, a shaft or sleeve 9,journaled at the outer end of the arm 4 and carrying a marking-point, ashaft or sleeve 12, connected to the shaft 9 and carr'ying amarking-point, and means for imparting motion to the shaft 12 around theshaft 9, substantially as set forth.

2. In an apparatus for delineating the moons orbit, the combination ofthe main radial arm 4, a shaft or sleeve 9, journaled at the outer endof the arm 4 and carrying a 1narking-point,ashaft or sleeve12, connectedto the shaft 9 and carrying a marking-point, the arbor 3, and fixed gear1, concentric therewith, the spindle 5, having at one end a gear 6,meshing with the gear 1, and at the other end a bevel-gear 7, and abevel-gear 8 on the vertical shaft or sleeve 9, meshing with the gear 7,substantially as set forth.

3. In an apparatus for delineating the moons orbit, the combination ofthe main radial arm 4, a shaft or sleeve 9, journaled at the outer endof the arm 4 and carrying a marking-point, a shaft or sleeve 12,connected to the shaft 9 and carrying a marking-point, the arbor 3, andfixed gear 1, concentric therewith, the spindle 5, having at one end agear 6, meshing with the gear 1 and at the other end a bevel-gear 7, thebevel-gear 8 on the vertical shaft or sleeve 9, the globes l3 and 14,carried by the shaft or sleeve 9, and lamp 15, mounted above the arbor3, substantially as set forth.

JOSEPH TROLL.

Witnesses:

PETER W. LILL, FRED. SUNBEL.

